Hot and cold water mixing valve.



B. H. JANSEN.

HOT AND COLD WATER MIXING VALVE.

APPLICATION man DEC. 1a. 1913.

L1 34,273 Patented Apr. 6, 1915.

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THE NORRIS PETERS C0,, PHOTO LITHO" WASHIIIGION. D. c.

B. H. JANSEN.

HOT AND cow WATER MIXING VALVE.

APPLICATION FILED DEC- l3| 1913. 1 134 273 Patented Apr 6, 1915.

2 SHEETS-SHEET 2.

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HE NORRIS PETERS 50., PHOTO-LITHO., WASHINGTON, u. L,

BERNARD H. JAN'SEN, 0F CLEVELAND, OHIO.

HOT AND COLD WATER MIXING VALVE.

Specification of Letters Patent.

Patented Apr. 6, 1915.

Application filed December 13, 1913. Serial No. 806,367.

To all whom it may concern Be it known that I, BERNARD H. JANsnN, a citizen of the United States, residing at Cleveland, in the county of Cuyahogaand State of Ohio, have invented certain new and useful Improvements in Hot and Cold ater Mixing Valves, of which the following is a specification.

My invention relates to improvements in hot and cold water mixing valves and the improvement comprises a mixing valve constructedand arranged substantially as herein shown and described and more partlcularly pointed out in the claims.

One of the objects of the invention is to rovide a simple and compact structure in which the hot and cold water may be thoroughly mixed in a relatively large volume and before discharge so as to produce constant discharge of water at a uniform temperature.

In the accompanying drawings Figure is a sectional view centrally through the caslng and cover of the valve showing the operating valve parts in side elevation, the section being taken on the line of the discharge connection. Fig. 2 is a sectional view of the casing and operating parts on the line of the hot and cold water intake connections. Fig. 3 is a cross section on line 33, Fig. 2, showing both intake connections and the discharge connection. Fig. 4 is a side elevation of the cover, and Fig. 5 is a part section and part side view of the caslng or body.

The device comprises a cylindrical body 2 having a central core 3 of cylindrical form cast integral with its bottom 4: and extending the full height of the side wall of said body. The diameter of core 3 relatively to the body 2 is such that a fairly large chamber 5 is provided within which a large volume of the liquid may be thoroughly mixed before final discharge through a side connection 6. Intake of the liquid is at two diametrically opposite points in the casing, the connection 7 at one side serving for the intake of hot fluid and connection 8 on the opposite side serving as an entrance for a cold fluid. A walled passage 9 extends downwardly from connection 7 on the inside of body 2 and thence along the bottom to the center and to the bottom of core 3, which is provided with a valve seat 10 at its immediate bottom through which the fluid must pass before entering the central bore 11 in said core. A second valve seat 12 of slightly larger diameter than seat 10 is provided midway of the core, and the upper end of said bore 11 is slightly larger internally than the central portion and is provided with plural screw threads of relatively deep pitch. The water passes from bore 11 into chamber 5 by way of one or more openings 14 in the side of the core. The cold fluid from connection 8 enters bore 11 by way of a walled passage 15 at a point approximately midway of the length of the central portion of bore 11 and the fluid discharges through valve seat 12 and the openings 14 into chamber 5. The valve members which control the flow of the fluid from the respective intakes 7 and 8 comprise a valve stem 16 having a threaded enlargement 17 operating in the threaded portion of the core, the lower end of the enlargement being recessed and seating a fiber or rubber washer 18 which is adapted to engage and close seat 12 when the stem is in its lowermost position. A bolt 19 has screw-threaded engagement with the bottom end of the stem or its enlargement to secure a cylindricalplunger 20 rigidly in place against the washer 18, thereby holding said washer also in place, and the outer or bottom end of the bolt has a collar portion 21 which fits snugly within the round passage extending through seat 10. Said collar 21 bears against a fiber or rubber washer 22 in the recessed and enlarged end 23 of plunger 20, and said enlarged end fits snugly within bore 11 to afiect partial or entire closure of the passage 15 at the point where it enters bore 11, but only when the valve stem and its plunger is raised by rotation more or less.

A handle 2& at the top of the stem serves to rotate the stem and its valve members and a finger 25 extends downwardly from said handle into pointing relations with suitable indexes or marks on the cover 26 whereby the relative open and closed positions of the valve members may be determined from without. For example, a quarter or third turn of the handle will raise the valve stem sufficiently to uncover seat 12 but without 7 withdrawing collar 21 from seat 10, thereby permitting the cold fluid to pass out through passage 15 into bore 11 and out through openings 14: into the mixing chamber 5. If

the stem is held in this particular position only a cold fluid will be delivered through discharge connection 6. However, another quarter or third turn to the stem will open seat 10 by the complete withdrawal of collar 21, and then the hot fluid as well as the cold fluid will pass through bore 11 into chamber 5 where the two fluids will be intimately and thoroughly mixed. Further rotation of the stem in the same direction will cause more hot water than cold water to be delivered into chamber 5 as the enlarged end 23 of the plunger then acts to cut off the cold water. When the stem has been rotated to its maximum or highest position all the cold fluid will be cut off and nothing but the hot fluid will enter chamber 5. Complete closure of the outlet end of the passage 15 is made possible by the snug fit of the annular end 23 of the plunger and the free flow of the hot fluid from seat 10 is made possible by providing an offset passage 27 at one side of core 3 and open to bore 11 between seats 10 and 12.

The limit of rotation and axial movement of stem 16 is adjustably fixed by a screw 28 extending through the bottom of a screw threaded opening 29 in cover 26 at the side of extension 30 which supports the gland 31 for the packing 32 about stem 16. A metal washer33 is seated upon the stem enlargement 17 to make contact with screw 28 to stop the stem in its movement, and this ring is loosely mounted so that a slight rotative movement of the stem will be accommodated when initial contact is made. The ring 33 protects the enlargement as without the said ring the screw 28 would soon embed itself or so mar the top engaging surface that all adjustments would be imperfect,

necessitating frequent changes. The upper end of the screw opening 29 is preferably sealed by a separate screw 34 and said screw and its opening is set at an inclination to the axis of the stem.

The cover 26 has an annular flange 35 closing the joint at the top of body 2 and said body is provided with an inwardlyextending flange at its top to seat a gasket 37, Screws 38 pass through the cover bel. A mixing valve comprising a body hav- 7 ing a cylindrical core centrally thereof and a circular chamber about said core provided with walled water-intake passages extending through said chamber to the core and provided with a discharge passage from said chamber, said core having differential bores with screw threads and discharge'openings in its upper end and a pair of valve seats at different elevations therein, in combination with a screw-threaded valve stem and a pair of valve members therewith to engage said seats and provided each with a valve plunger to snugly fit the correspondingly differential bore.

2. A mixing valve, comprising a chambered body having a central core provided with valve seats and intake and discharge ports for the fluid, in combination with a screw stem having valve members to control the flow of fluid through said ports, a r0- tatable metal ring carried by said stem, and an adjustable stop to engage said ring and limit the movement of said stem.

3. A mixing valve comprising a cylindrical body having an annular chamber and a central core provided with valve seatsand intake and discharge ports, an annular inwardly-extending flange at the top of said body, a gasket seated upon said flange, a

cover for said body seated upon said gasket,

means to secure said cover in place, and a packing gland centrally of said cover,:in combination with a screw stem engaged within said core and having valve members to engage said valve seats and to control said ports, an adjustable stop on said cover for the stem, and means loosely mounted upon the stem adapted to be engaged by said stop.

In testimony whereof I aflix my signature in presence of two witnesses.

V BERNARD H. JANSEN. Witnesses R. B. Mosnn, E. M. FISHER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

